The venting system of a gas fireplace is critical to its efficient, safe functioning. Relying on cheaply made, inferior quality vent pipe is a dangerous mistake; Napoleon provides this complete kit to construct a solid, durable venting system that you can depend on. The system is built with double-ply aluminum and can be used for the GDIZC, GDI-44, or GDI-30 fireplace insert models. Installation is easy and convenient, so you will be enjoying the full capabilities of your insert soon.